Chaperones, Canalization, and Evolution of Animal Forms

Chaperones, Canalization, and Evolution of Animal Forms
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伴侣、运河化和动物形态的进化

DOI:
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发表时间:
2018
影响因子:
5.6
通讯作者:
A. Sato
A. Sato
中科院分区:
生物学2区
文献类型:
--
作者:
A. Sato

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半个多世纪前,英国发育生物学家康拉德·哈尔·沃丁顿提出了渠化的概念,即发育中的动态平衡。自从Rutherford和Lindquist(1998)提出Hsp90在发育缓冲中的作用以来,伴侣蛋白在管化的研究中受到了极大的关注。然而,最近的研究表明,许多其他分子也可能参与管化。在这里,我介绍了DNAJ伴侣在导管形成中的新角色。我还讨论了如何改变这种缓冲分子的表达水平,从而改变生物的发育。由于发育稳健性在各种生物体中是母性遗传的,我认为动态的BET对冲,即由母亲面临的不可预测的环境挑战导致的后代窝内表型变异的增加,在改变缓冲分子的表达水平方面发挥了关键作用。在分子水平上研究动态投注套期保值及其对形态表型的影响,将有助于我们理解管化和进化过程的分子机制。
Over half a century ago, British developmental biologist Conrad Hal Waddington proposed the idea of canalization, that is, homeostasis in development. Since the breakthrough that was made by Rutherford and Lindquist (1998), who proposed a role of Hsp90 in developmental buffering, chaperones have gained much attention in the study of canalization. However, recent studies have revealed that a number of other molecules are also potentially involved in canalization. Here, I introduce the emerging role of DnaJ chaperones in canalization. I also discuss how the expression levels of such buffering molecules can be altered, thereby altering organismal development. Since developmental robustness is maternally inherited in various organisms, I propose that dynamic bet hedging, an increase in within-clutch variation in offspring phenotypes that is caused by unpredictable environmental challenges to the mothers, plays a key role in altering the expression levels of buffering molecules. Investigating dynamic bet hedging at the molecular level and how it impacts upon morphological phenotypes will help our understanding of the molecular mechanisms of canalization and evolutionary processes.
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